Mounting for weft detectors



April 29, 1930. c. P. BERGSTROM 1,756,581

MOUNTING FOR WFT DETECTORS Filed Jan. l5, 1929 Patented Apr. 29, 1930 UNITED STATES PATENT OFFICE CARL P. BERGSTROM, OF MILLBURY, MASSACHUSETTS, ASSIGNOR TO CROMPTON & KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS MOUNTING FOR WEET DETEGTORS Application filed January 15, 1929.

This invention relates to improvements in weft detectors more particularly to the means for supporting the same to the end that the detector may move forwardly if engaged by a 'l misplaced bobbin.

pending application Ser. No. 263,469, I have shown a means for mounting a weft detector on one of the tie rods of the usual formbf stationary magazine. In that application the depending support is held in fixed position on the tie rod. f

It is an important object of my present invention to provide yielding means for the support together with guide means so that as the support moves pivotally with respect to the tie rod it-will not lose its proper position in a direction longitudinally of the surface being detected. Y

It is a further object of my invention to provide a detector support and a guide for the Vmounting adjustable longitudinally and angularly with respect tothe tie rod, the support being movable relatively to the guide member against the action of a yielding element which serves to return the detector support to normal position.

With these and other objects in view which will appear as the description proceeds, my invention resides Vin the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings, wherein a convenient embodiment of my invention Vis set forth,

Fig. 1 is a vertical section through a weft replenishing mechanism :of the multicolor type showing my improved form of detector applied thereto;

Serial No. 332,693.

Fig. 3 is a detailed horizontal section on line 3 3 of Fig. 2.

Referring particularly to Fig. 1, I have` shown a loom frame 10 on which is mounted a magazine 11 of the usual multicolor form. Said magazine includes in its construction several tie rods, two of which are shown at 12. The lay 13 is provided with the usual boX back 14 and binderfl between which is received a shuttle S carrying the bobbin B. Aligning slots 16 are provided in the binder and shuttle for the reception of a detector 17.

The detector may be of the form shown in co-pending application,- Ser; No. 200,481, filed by Payne, and includes a` bed 18 and cap 19 between which yslide arcarrier the forward upturned end of which is indicated at 20 inrFig. 1. A bolt 21 extends through the bed and cap and also through a horizontal extension 22of a depending arm 23 which derives its support from the forward tie use to the particular form of detector shown,

and-it is sulcient for the purposes of my present invention to statethat the detector will ordinarily function withoutgmovement y of the extension 22 0r arm 23.-

fect I form the upper end of the support 23 with a hub 30 through which freely extendsV the forward tie rod 12. This hub is free to rotate in a right hand direction as viewed m Fig 1 about the tie rod eXcept'as it is restrained yieldingly by a torsionspring 31V having `an end 32 extending asat 33 behind a guiding and holding member 34. The latter is held in adjusted longitudinal and angular position on the forward rod 12 by a set screw 35.

The member 34 is provided with a horizontal arm 36 provided with a notch 37 to rev.In carrying my present'invention into, ef-` The notch 37 limits rearward movement of the su) ort y23 under action of the s rino D 31, the rear end of the notch being deter ifo minedas to position by the set screw 35.v

In operation the lay 13 will have a detecting beat every alternate pick of the loom to present the bobbin B to the detector 17. Under normal conditions the support 23 will remain at rest, the spring 37 being sufhciently strong to overpower the yielding devices not shown which act upon the detector. Should a misplaced bobbin be accidentally interposed between the lay and thedetector 13 or the bed and cap, the lower end of the support 23 will move in a clockwise direction as viewed in Fig. 1 around the tie rod 12 against the action of spring 31. The slot 37 is of sufficient depth and is near enough to the axis of the support 23 so Vthat it 'will lbe operatively related to the detector carrier for all probable movements of the latter in a forward direction. When the Vabnormally placed'bobbin is removed the spring 31 will act to restore thesupport 23 to its normal position in the notch 37. Y

From the foregoing it will be seen that l have provided a verysimple means for Vsupporting a weft detector on a usual part of a multicolor weft replenishing loom so that the guiding and positioning member 34 may act to locate the position of the bed and detector in adirection toward and from the lay, while permitting yielding forward move r ment of the 'detector'. It willfurther be seen that the arm 36 is sol near the vtie rod 12 that a'portion ofthe support will occupy the notch 37 for practically all forward positions of the supporting member 23.

Having thus described my invention it will be apparent that changes' and modifications may be :made therein by-those skilled in the art without departing from the spirity and scope of the invention and I do not wish to be limited to the'details herein disclosed, but what I claim is: Y

Y Y '1. rInV a weft detector for a loom having ka surface to be detected, a normally fixed member substantially parallel to the surface to be detected, a support longitudinally and angularly adjustable on the member, a weft `engaging detecting element mounted onV the support, and a guiding .device mounted on the member and heldin adjusted angular posi#` Y mi) pef'rating'with the SllpPOrt to limit the inovetion onthemember and determining the position and path'of movement of the support ment-ofthe latter 'along' the member in the direction of the lengtho'f the latter.

l' Y 2.; In! a weft detector for a lloom having Ya surface lto be detected, a normally fixed .member-'substantially parallel to the surface to be detected, `a.. yarn engaging weft detectsupport longitudinally of the member.

' 3. In a. weft detector for a loom having member substantially parallel to the surface to be detected, a yarn engaging weft detecting element, a support therefor movable angularly about'the member to carry the detector forwardly, and a guiding-device secured to the member and having a pair of spaced portionssubstantially parallel to the direction of movement of the detector as the latter ino-ves forwardly, said portions being va surface'to bedetected, a normally fixed normally in engagement with the support to restrain movement of the latter in a direction parallel to the member.

4. ln a weft detector for a loom having aV surface to be detected, anormally fixed member substantially parallel to the surface to be detected, a guiding member secured in adjusted angular position on the member and having a slot extending substantiallypei1w pendicular to the member, the support eX#` esV tending through the slot and engaging the Y portions of the guide device on Vopposite sides VVof thesl'ot to be restrained as to motion in a direction parallel to the member, and :resilient means toV hold the support normallyseated inthe slot, the guiding device positi'oniiig the support with respect tothe' surfaceV to be detected.

5. In aweft detector for a loom havinga surface to be detected, anormally fixed member substantially parallel to the surface to be detected, a yarn engaging weft detecting element, a support therefor movable about the member to carry the detector forwardly,'aV Vguiding and positioning'device secured inV adjusted angular positionon the member Vand havin@ a slot to receive the su Vort said su b. PP v Y port being movable in a direction substantial- -I ly perpendicular to the member in-one direction and being restrained against ,movement positioning device, and resilient means interin the opposite direction by the guiding and p posed between the device and support to hold the latter normally yieldingly in'irearward position against a portion of the device."

6. Ina weft detector for a loomfhaving a surface to be detected, a normally fixedfmember Vsubstantially parallel to .thev surface to y Vbe detected, a Vyarn engaging weft detecting i element, a support therefor movableabout the member to carry Ythe detector forwardly, and a'guiding and positioning.deviceadjustable angularly and longitudinallywith respect tothe member andjhaving a guideedge t substantially perpendicular' to the member to restrain movement of the support in a `direction parallel to the member, said support be* ing movable in a direction perpendicular to the member and substantially parallel to said portion. e

7 surface to be detected, a normally fixed member substantially parallel to the surface to be detected, a yarn engaging weft detecting element, a support therefor movable about the member to carry the detector forwardly, a guiding and positioning devicel adjustable angularly and longitudinally with respect to the member and having a guide edge substantially perpendicular to the member to Vrestrain movement of the support in a direction parallel to the member, said support being movable in a direction perpendicular to the member and substantially parallel to said portion, and resilient means between the device and the support to hold the latter normally against a portion of the device.

8. In a weft detector for a loom having a surface to be detected, a normally fixed member substantially parallel to the surface to be detected, a yarn engaging weft detecting element, a support therefor movable about the member to carry the detector forwardly, a holding and positioning device longitudinally and angularly adjustable on the member, a substantially cylindrical hub formed as a portion of said device, an arm extending below the hub and substantially parallel to the member and having a slot therein to receive a portion of the support, said slot extending in a direction perpendicular to the member, and a torsion spring surrounding the cylindrical hub of the device and engaging the support to hold the latter normally in the slot, said support and detector being movable forwardly against the action of the spring and the support being guided by the portions of the device dening opposite sides of the slot.

In testimony whereof I have hereunto affixed my signature.

CARL P. BERGSTROM.

. In a weft detector for a loom having ar 

